1
: provided by an official U.S. military supply department
GI shoes
2
: of, relating to, or characteristic of U.S. military personnel
3
: conforming to military regulations or customs
a GI haircut
plural GIs or GI's
ˌjē-ˈīz 
: a member or former member of the U.S. armed forces
especially
: a man enlisted in the army
: in a strictly regulation manner
: to clean (something) thoroughly in preparation for or as if for a military inspection
The barracks … were in fine order—they'd been GI'd the night before.—
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Examples of gi in a Sentence
Verb
in preparation for one of her mother-in-law's dreaded visits, she had GI'd the whole house
Recent Examples on the Web
Jillian Kubala, Health, 28 Jan. 2025
For instance, individuals with certain gastrointestinal (GI) conditions may find white bread easier to digest.2
How Do the Bread Types Differ?
—Sarah Jividen, Verywell Health, 23 Jan. 2025
All parts of this plant contains saponins, which can cause salivation, vomiting and GI upset.
—Arricca Elin Sansone, Southern Living, 15 Jan. 2025
This helps to reduce GI side effects from the drug.
—Fran Kritz, Verywell Health, 14 Jan. 2025
See all Example Sentences for gi 
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Noun
This means that compared to other breads, sourdough is low on the glycemic index (GI), a classification system that ranks carbohydrate-rich foods on a scale of 0-100 according to their impact on blood sugar levels.
—Jillian Kubala, Health, 28 Jan. 2025
For instance, individuals with certain gastrointestinal (GI) conditions may find white bread easier to digest.2
How Do the Bread Types Differ?
—Sarah Jividen, Verywell Health, 23 Jan. 2025
All parts of this plant contains saponins, which can cause salivation, vomiting and GI upset.
—Arricca Elin Sansone, Southern Living, 15 Jan. 2025
This helps to reduce GI side effects from the drug.
—Fran Kritz, Verywell Health, 14 Jan. 2025
See all Example Sentences for gi
Dictionary Entries Near gi
Cite this Entry
“Gi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gi. Accessed 31 Jan. 2025.
Copy CitationKids Definition
GI
1 of 2 adjective
: of, relating to, or characteristic of U.S. military forces
GI
2 of 2 noun
plural GIs or GI's
: a member or former member of the U.S. armed forces
Etymology
Adjective
from the abbreviation for galvanized iron used in listing such articles as garbage cans, but mistaken as standing for government issue
Medical Definition
GI
abbreviation1
gastrointestinal
2
glycemic index
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